How do I know that my 8 month baby is healthy? What are the signs of 8 month healthy baby?

A. The best is to check what is the weight of your child it should be minimum 4 kg more than the birth weight along with that it should be that your child should be having proper growth reaching the milestone like sitting independently by the time of 8 to 8 1/2 months should be proper rollover and they said some kids can stand well with support also